#2288DA
Closest named color: Water Blue (#0E87CC). oklch(61.2% 0.153 248.5), rgb(34, 136, 218).
Aa
Black text reads best on this color (5.60:1).
About this color
#2288DA is a medium-dark, vivid blue. In OKLCH its lightness is 61%, its chroma 0.153 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.023 away. Black text reads best on it, at 5.60:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.153) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.60:1 |
| White text | 3.74:1 |
Values
| HEX | #2288DA |
| RGB | rgb(34, 136, 218) |
| HSL | hsl(207, 73%, 49%) |
| OKLCH | oklch(61.2% 0.153 248.5) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #2288DA | 3.74:1 | AA large text | Lc -70.0 | Content text, not long reading |
| Black text on #2288DA | 5.60:1 | AA | Lc 39.5 | Non-text elements, placeholder text |
| #2288DA text on white | 3.74:1 | AA large text | Lc 64.5 | Content text, not long reading |
| #2288DA text on black | 5.60:1 | AA | Lc -37.1 | Non-text elements, placeholder text |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 500.
-
Step 50
50
#F0F6FC
oklch(97% 0.01 247.9)
-
Step 100
100
#DFEBF8
oklch(93.5% 0.022 250.2)
-
Step 200
200
#C5DCF4
oklch(88.5% 0.041 249.4)
-
Step 300
300
#9BC5EF
oklch(80.8% 0.075 248.8)
-
Step 400
400
#61A6E7
oklch(70.7% 0.119 248.5)
-
Step 500
500 (this color)
#2288DA
oklch(61.2% 0.153 248.5)
-
Step 600
600
#0077C7
oklch(55.7% 0.152 248.5)
-
Step 700
700
#0064A8
oklch(49.2% 0.133 248.3)
-
Step 800
800
#00518B
oklch(42.6% 0.117 248.8)
-
Step 900
900
#044473
oklch(37.7% 0.099 248.1)
-
Step 950
950
#082844
oklch(27% 0.064 249)
#2288DA with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #608DDD | 0.052 |
| Deuteranopia (no green cones) | #447CD8 | 0.035 |
| Tritanopia (no blue cones) | #009CA6 | 0.111 |
| Achromatopsia (no color) | #848484 | 0.153 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2288DA
#2288DA
oklch(61.2% 0.153 248.5)
- #B77200
#B77200
oklch(61.2% 0.134 68.5)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #2288DA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.023
- Dark Sky Blue #448EE4 ΔE 0.032
- Windows Blue #3778BF ΔE 0.054
- Chefchaouen Blue #4895EF ΔE 0.054
- Cool Blue #4984B8 ΔE 0.054
- Dodger Blue #1E90FF ΔE 0.057
- Steel Blue #4682B4 ΔE 0.059
- Soft Blue #6488EA ΔE 0.060
Use #2288DA in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.